Don is a sales representative for a car dealer company. He earns $850 plus 5% on every car he sells. His usual fortnight expense is $795. In one fortnight he sold one car for $25000 and another for $50000. How much did he save that fortnight.
Don earned $25000 * 5/100 = $<<25000*5/100=1250>>1250 for selling the first car.
Don earned $50000 * 5/100 = $<<50000*5/100=2500>>2500 for selling the second car.
So, Don's total earning for that fortnight is $2500 + $1250 + $850 = $<<2500+1250+850=4600>>4600.
Don's expenses for that fortnight is $795.
Therefore, Don saved $4600 - $795 = $<<4600-795=3805>>3805. Answer: \boxed{3805}.
To calculate how much Don saved that fortnight, we need to calculate his total earnings and then subtract his expenses from it.
Step 1: Calculate Don's earnings from selling cars.
Car 1: $25000
Car 2: $50000
Earnings from Car 1: $25000 * 0.05 = $1250
Earnings from Car 2: $50000 * 0.05 = $2500
Total earnings from selling cars: $1250 + $2500 = $3750
Step 2: Calculate Don's total earnings.
Base salary: $850
Total earnings from selling cars: $3750
Total earnings: $850 + $3750 = $4600
Step 3: Calculate Don's savings.
Savings = Total earnings - Expenses
Savings = $4600 - $795 = $3805
Therefore, Don saved $3805 that fortnight.